Giants fans, fairweather or not, packed BART and other transit systems across the Bay Area yesterday en route to a parade celebrating the team’s World Series victory.

BART trains, already running the maximum number of cars for the occasion, filled to capacity as early as 8 a.m. By noon, the transit system was already reporting 72,000 more riders than a typical weekday.

“I’ve never seen anything like this before in my 15 years working with BART,” said station supervisor Dennis Scanlan, adding that he’s worked his share of New Year’s Eves and Pride Parades. Scanlan, usually stationed in the East Bay, was working at Montgomery Station, which was temporarily closed as officials and BART police struggled to contain the crowds.

By the end of the day, BART had shattered its record for highest ridership in its 38-year history, transporting 522,200 people between 4 a.m. and midnight. The previous record had been set during the emergency closure of the Bay Bridge that brought the Bay Area to a standstill.

The transbay commute seemed at its worst as the parade’s 11 a.m start time neared.